Combinatorial testing accessory of vibration testing platform and static fatigue testing method

A vibration test bench and combined testing technology, which is applied in vibration testing, testing of material strength by applying repetitive force/pulsation force, testing of machine/structural components, etc., can solve the problem of low frequency of fatigue testing machine, single testing method and vibration fatigue And other issues

Active Publication Date: 2014-09-03
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the shortcomings of low frequency of current traditional fatigue testing machines, vibration test benches such as electrodynamic vibration test benches or electromagnetic excitation vibration test benches that can only perform vibration fatigue and single testing methods, and provide a combination of electrodynamic vibration test benches. Test accessories and the static fatigue test method implemented by using the combined accessories

Method used

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  • Combinatorial testing accessory of vibration testing platform and static fatigue testing method
  • Combinatorial testing accessory of vibration testing platform and static fatigue testing method
  • Combinatorial testing accessory of vibration testing platform and static fatigue testing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment ( 1

[0092] Embodiment (one): the combined test accessory for vibration test bench, such as Figure 1-18 shown.

[0093] Take the ET-10d-240 electric vibration test bench as an example, the span of the vibration test bench L=980mm, and the diameter of the vibration test bench D=240mm. According to this type of electric vibration test bench, the combined accessories are designed, and all accessories are made of 42CrMo steel, which is made by forging, quenching and tempering and machining.

[0094] 1. Support bracket

[0095] Such as figure 1 , figure 2 As shown, the support bracket 1 is composed of a base 1-1, a bracket leg 1-2, a bracket arm 1-3, a threaded hole 1-4 and a fastening bolt 1-5; the bracket leg 1-2 is 300mm wide, 150mm high, The thickness is 20mm; the bracket arm 1-3 is 300mm long, 300mm wide, and 20mm thick, and the free end of the arm is symmetrically drilled with 4 M10 threaded holes 1-4 along the width direction; the base 1-1 is 600mm long, 100mm wide, and 20m...

Embodiment

[0107] Embodiment (two): bending fatigue test, such as Figure 19 ~ Figure 27 shown.

[0108] 1. If Figure 19 , Figure 20 As shown, the cantilever bending fatigue test consists of a support bracket 1, a fixed sample holder 2-1, a simply supported vibration sensor 3-1, a vibration test bench frame 5, and a vibration test bench table 6 , Sample 7; the sample is a strip plate, one end of which is a clamping end with a bolt hole, and the clamping end can be wider than the non-clamping part.

[0109] Before the test starts, the base 1-1 of the support bracket 1 is installed on the vibration test bench frame 5 through the fastening bolt 1-5; the connection end 2-1-1 of the fixed support sample holder 2-1 Install on the support arm 1-3 of the support bracket 1 through the fastening bolt 2-1-4; install the base 3-1-1 of the simply supported vibration sensor 3-1 on the support arm 1-3 through the fastening bolt 3-1-5 On the table 6 of the vibration test bench, and keep the three ...

Embodiment ( 4

[0125] Embodiment (four): tension-pull or tension-compression fatigue test, such as Figure 32 shown.

[0126] The tension-pull or tension-compression fatigue test consists of 2 support brackets 1, 1 follower sample holder 2-4, 1 fixed support vibration transmitter 3-3, 1 bridging bracket 4, vibration test bench Frame 5, vibration test bench top 6, and sample 7; the sample is a strip plate, and both ends of the strip plate are clamping ends with bolt holes.

[0127] Before the start of the test, install the bases 1-1 of the two supporting brackets 1 on the vibration test bench frame 5 on both sides through fastening bolts 1-5, and fasten the base 4-1 of the bridging bracket 4 through the fastening bolts 1-5. Bolts 4-6 are installed on the bracket arms 1-3 of the two supporting brackets 1, and the base 3-3-1 of the fixed-supported vibration transmitter 3-3 is installed on the vibration test bench by fastening the bolts 3-3-4 On the table top 6; the follow-up sample holder 2-4...

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Abstract

The invention relates to a material and structure testing device and method, and in particular relates to a combinatorial testing accessory of a vibration testing platform and a static fatigue testing method. The combinatorial testing accessory consists of support brackets, a test sample clamp, a vibration transmission device and a bridging bracket. When the accessory is combined, the support bracket is mounted on a vibration testing platform rack, the bridging bracket is mounted on the two support brackets in a spanning manner, the test sample clamp is mounted on the support brackets for clamping a test sample, and the vibration transmission device is mounted on the surface of a vibration testing platform. According to the static fatigue testing method, the combinatorial accessory is mounted on the vibration testing platform and is used for performing 7 types of 13 static fatigue tests on the test sample. The testing device and the testing method expand the function of the vibration testing platform, achieve diversification of load modes, including multiple load modes of pulling, compression, bending, twisting and the like and the combination of the load modes, in the fatigue testing, have a large range of testing frequency, are capable of performing fatigue testing on 5-4500 Hz, and are applicable to high cycle and super high cycle static fatigue testing research on materials and structures.

Description

1. Technical field [0001] The invention relates to test equipment and a test method for materials and structures, in particular to a combined test accessory for a vibration test bench and a static fatigue test method. 2. Background technology [0002] Static fatigue or traditional fatigue, that is, the frequency distribution of the alternating loads on the structure does not intersect with the natural frequency distribution of the structure, resulting in fatigue damage without the contribution of structural resonance. Static fatigue test is the main method of fatigue test. Due to the development of science and technology such as electronic technology and hydraulic technology, traditional fatigue testing machines have gradually developed from mechanical loading to hydraulic loading, electromagnetic excitation loading, pneumatic loading and electromagnetic— Advanced methods such as hydraulic joint loading. The frequency of static fatigue tests is usually tens to hundreds of h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/02G01N3/04G01N3/32G01M7/02
Inventor 王威强王鹏飞张明刘燕李剑峰
Owner SHANDONG UNIV
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